Small PLC – Open Source Hardware Project

This small brick-type PLC open source hardware project is based on an ARM7 microcontroller from Atmel. The PLC has 10 digital inputs, 8 digital outputs, 4 analog inputs, a real time clock, RS232 port, RS485 port, USB port and JTAG port.




More information and circuit diagrams are available at the above link.

Small Open Source PLC

Small Open Source PLC

10 thoughts on “Small PLC – Open Source Hardware Project

  1. Very nice project. If I decide to build it, can you please let me know how much it would cost? I did not find any parts list. (I do not use Altium designer).
    Thank you for your reply

    • Hi Lad
      The parts for the PLC were roughly $90, but I made a batch of them at one time so pricing is for bigger quantities of PCBs and components.

  2. Hello.

    It is very cool.
    Do you know anybody, who is building this kit for sale?
    I have not equipment for producing the prints, and my soldering skills
    are mostly for “dead bug” style.

    Best regards
    Arnold

    • Hi Arnold
      I don’t think there is anyone selling this as a kit. I have built a few that I use for my own work.

  3. Hi,
    Thanks for sharing nice project. I am a hobbyist i have a few doubts.
    1. Can i replace a AT91SAM7S256 cpu with ATSAM3S4B which has adc 12bit resolution and it is pin to pin compatible with sam7s series.
    2. If i use 4-20ma temperature sensor with 4-20ma to 0 – 10v converter, can i make it work?

    Thanks & Regards,
    Bharath.

  4. Very nice project
    Forgive me for my ignorance.
    But I can not see the firmware!
    Where is it?
    There is in Hexa?
    Thank you
    Edmar

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